From 37886813e71629363342a0503a83e39c8e840eb0 Mon Sep 17 00:00:00 2001
From: Jan Beich <jbeich@FreeBSD.org>
Date: Wed, 1 Jan 2020 11:02:37 +0000
Subject: autotools: avoid -ldl if not required or not supported

ld: error: unable to find library -ldl
---
 configure.ac | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 2fce554..8484e43 100644
--- a/configure.ac
+++ b/configure.ac
@@ -209,6 +209,11 @@ if test "$ac_cv_have_gnuc_visibility_attribute" = "yes"; then
               [Defined to 1 if GCC visibility attribute is supported])
 fi
 
+# Check for -ldl (often not required)
+AC_SEARCH_LIBS([dlopen], [dl], [], [
+  AC_MSG_ERROR([unable to find the dlopen() function])
+])
+
 # Check for -fstack-protector
 ssp_cc=yes
 if test "X$CC-cc" != "X"; then
-- 
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